CN204788346U - Readable type latitude determination appearance - Google Patents
Readable type latitude determination appearance Download PDFInfo
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- CN204788346U CN204788346U CN201520346443.6U CN201520346443U CN204788346U CN 204788346 U CN204788346 U CN 204788346U CN 201520346443 U CN201520346443 U CN 201520346443U CN 204788346 U CN204788346 U CN 204788346U
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Abstract
The utility model discloses a readable type latitude determination appearance, this readable type latitude determination appearance include reading panel (1), sighting rod (2), base (3), protractor (4), first horizontal pole (5) and first weight (6), the one end of the bottom surface of reading panel (1) and the one end hinged joint of base (3) for reading panel (1) can serve as the center with the junction of reading panel (1) and base (3) and rotate, the bottom mounting of sighting rod (2) sets up in the up end of reading panel (1), sighting rod (2) be located reading panel (1) with the one end that base (3) is connected, and the up end of sighting rod (2) perpendicular to reading panels (1), first horizontal pole (5) set up in the top of sighting rod (2), and first horizontal pole (5) and sighting rod (2) mutually perpendicular, protractor (4) are fixed to be set up in the intermediate position of sighting rod (2), and sighting rod (2) are located the center of protractor (4). Readable type latitude determination appearance can measure the await measuring latitude in place of surface to can improve the measurement accuracy of earth table face weft degree.
Description
Technical field
The utility model relates to the field of measuring technique of the latitude of earth surface, particularly a kind of readable type latitude determination instrument.
Background technology
As everyone knows, the latitude of earth surface any point is exactly the angle number of degrees that the line of this point and the earth centre of sphere is formed with equatorial plane.The latitude in equator is 0 °, and the latitude of the South Pole and the arctic is all 90 °.
In prior art, the method for the latitude of conventional measurement earth surface is mark post shadows cast by the sun methods.Mark post shadows cast by the sun ratio juris is: when measuring " high noon " of day, one mark post is erect perpendicular to ground, the one side of the mark post sun dorsad forms the shadow of mark post, and the shadow of mark post and mark post forms a triangle, and the number of degrees of this leg-of-mutton drift angle are the latitude measuring place.
As shown in Figure 1, adopt mark post shadows cast by the sun method, hold up mark post PQ at measurement place P point perpendicular to ground, the local horizon crossing P point is L0, the extended line of mark post QP must through centre of sphere O, when being parallel to the sunlight mark post PQ of equator EF, form the shadow PT of mark post on the ground, because sunshine QT is parallel to equator EF, so ∠ TQP=∠ POF, it can thus be appreciated that in triangle T QP, the number of degrees of drift angle ∠ TQP are the latitude measuring place P point.If measuring place P point is positioned on the EF of equator, the latitude measuring place P point is 0 °; If measure place P point to be positioned at arctic point N point, the latitude measuring place P point is 90 °.
Mark post shadows cast by the sun method can measure the latitude of any point of earth surface.But there is following shortcoming in the application in mark post shadows cast by the sun method:
1. mark post shadows cast by the sun method requires that sunshine is parallel with equator, but only have day in the Spring Equinox parallel with equator with day in Autumnal Equinox sunshine in 1 year, therefore, the mark post shadows cast by the sun method latitude value that measurement obtains in the every day except day in the Spring Equinox and day in the Autumnal Equinox is adopted all and between the actual latitude value in measurement place to there is deviation.
2. mark post shadows cast by the sun method is comparatively large by the impact in season, there is deviation between the latitude value namely obtained in same measurement place measurement in Various Seasonal.This causes by sun direct projection place in a year is constantly mobile between the tropic of Capricorn of the earth and the tropic of Cancer.
Be starved of a kind of new readable type latitude determination instrument.
Utility model content
The purpose of this utility model is the above-mentioned defect for prior art, provides a kind of readable type latitude determination instrument.
The readable type latitude determination instrument that the utility model provides comprises reading panel, mark post, base, protractor, the first cross bar and the first weight;
One end of the bottom surface of reading panel and one end chain connection of base, make reading panel can rotate centered by the junction of reading panel and base;
The bottom of mark post is fixedly installed on the upper surface of reading panel, and mark post is positioned at one end be connected with base of reading panel, and mark post is perpendicular to the upper surface of reading panel;
First cross bar is arranged at the top of mark post, and the first cross bar and mark post are mutually vertical;
Protractor is fixedly installed on the centre position of mark post, and mark post is positioned at the center of protractor;
First weight hangs on the center of protractor by rope, and the first weight can be freely sagging under gravity;
Base is provided with the first pole for supporting reading panel, and the first pole is inverted V-shaped; The top of the first pole and the bottom surface chain connection of reading panel, the openend of the first pole is towards the second cross bar, and the first pole and the second cross bar form a triangle;
Base is provided with organizes buckle more; The two ends of the second cross bar are fixed in any one group of buckle;
The bottom of base is provided with the second pole for base for supporting, and the second pole is connected with the bottom hinge of base, and the second pole and mark post are positioned at same one end of base;
The upper surface of reading panel such as to be provided with at latitude line and the datum line.
Preferably, described readable type latitude determination instrument also comprises the second weight and the 3rd weight that are hung on the first cross bar two ends by rope respectively, and the second weight and the 3rd weight can be freely sagging under gravity.
Preferably, described reading panel is rectangle.
Preferably, described base is rectangle.
Preferably, the adjustable length of described second pole.
Preferably, the adjustable length of described first pole.
Preferably, the bottom of described base is provided with three for regulating the leg of level.
Preferably, the described latitude line that waits is the one group of concentric circles that is the center of circle with the intersection point of described mark post and described reading panel.
Preferably, described datum line is long side direction along described reading panel and the straight line of intersection point by described mark post and described reading panel.
The utility model has following beneficial effect:
Compared with the mark post shadows cast by the sun method of prior art, described readable type latitude determination instrument can measure the latitude in earth surface place to be measured, and can improve the measuring accuracy of earth surface latitude.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the mark post shadows cast by the sun method of prior art;
The structural representation of the readable type latitude determination instrument that Fig. 2 provides for the utility model embodiment;
One of using state figure of the readable type latitude determination instrument that Fig. 3 provides for the utility model embodiment;
The using state figure bis-of the readable type latitude determination instrument that Fig. 4 provides for the utility model embodiment;
The partial enlarged drawing of the base of the readable type latitude determination instrument that Fig. 5 provides for the utility model embodiment;
The partial enlarged drawing of the mark post of the readable type latitude determination instrument that Fig. 6 provides for the utility model embodiment;
The schematic diagram waiting latitude line and datum line of the upper surface of the reading panel of the readable type latitude determination instrument that Fig. 7 provides for the utility model embodiment;
Fig. 8 is the geometric relationship schematic diagram waiting the radius of latitude line and the height of mark post;
One of schematic diagram of latitude determination side's ratio juris that Fig. 9 provides for the utility model embodiment;
The schematic diagram two of latitude determination side's ratio juris that Figure 10 provides for the utility model embodiment;
The schematic diagram three of latitude determination side's ratio juris that Figure 11 provides for the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, content of the present utility model is further described.
As shown in Figure 2, the readable type latitude determination instrument that the present embodiment provides comprises reading panel 1, mark post 2, base 3, protractor 4, first cross bar 5 and the first weight 6.
As shown in Figures 2 and 3, reading panel 1 is in such as rectangle, one end of the bottom surface of reading panel 1 and one end chain connection of base 3, it is hinged that hinge is passed through in one end of the such as bottom surface of reading panel 1 and one end of base 3, and reading panel 1 can be rotated centered by reading panel 1 with the junction of base 3.
As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 6, the bottom of mark post 2 is fixedly installed on the upper surface of reading panel 1, and mark post 2 is positioned at one end be connected with base 3 of reading panel 1, and mark post 2 is perpendicular to the upper surface of reading panel 1.First cross bar 5 is arranged at the top of mark post 2, and the first cross bar 5 is mutually vertical with mark post 2.Protractor 4 is fixedly installed on the centre position of mark post 2, and mark post 2 is positioned at the center of protractor 4.First weight 6 hangs on the center of protractor 4 by rope, and the first weight 6 can be freely sagging under gravity.
The present embodiment one preferred embodiment in, described readable type latitude determination instrument also comprises the second weight 7 the 3rd weight 8.Second weight 7 and the 3rd weight 8 hang on the two ends of the first cross bar 5 respectively by rope, and the second weight 7 and the 3rd weight 8 can be freely sagging under gravity.Second weight 7 and the 3rd weight 8 are for judging mark post 2 whether perpendicular to the upper surface of reading panel 1.When freedom is sagging under gravity for the second weight 7 and the 3rd weight 8, if be all positioned at straight line with mark post 2 for the rope hanging the second weight 7 and the 3rd weight 8, then mark post 2 is perpendicular to the upper surface of reading panel 1; Otherwise, the upper surface out of plumb of mark post 2 and reading panel 1.
As shown in Fig. 3, Fig. 4 and Fig. 5, base 3 is in such as rectangle.The first pole 9, first pole 9 that base 3 is provided with for supporting reading panel 1 is inverted V-shaped.The top of the first pole 9 and the bottom surface chain connection of reading panel 1, the bottom of the first pole 9 and openend are towards the second cross bar 10, and the first pole 9 and the second cross bar 10 form a triangle.Base 3 is provided with many group buckles 11.The two ends of the second cross bar 10 are fixed in any one group of buckle 11.During use, those skilled in the art can the position of manual adjustments second cross bar 10 as required.The second pole 12, second pole 12 that the bottom of base 3 is provided with for base for supporting 3 is connected with the bottom hinge of base 3, and the second pole 12 and mark post 2 are positioned at same one end of base 3.
Preferably, the material of base 3 and reading panel 1 is wood.Preferably, the adjustable length of the first pole 9.Preferably, the adjustable length of the second pole 12.Preferably, the bottom of base 3 is provided with at least three for regulating the leg (not shown) of level, can make base 3 and reading panel 1 level by regulating leg.
As shown in Figure 7, the upper surface of reading panel 1 such as to be provided with at latitude line and the datum line, one group of concentric circles that these latitude lines are is the center of circle with mark post 2 with the intersection point of reading panel 1, this datum line is long side direction along reading panel 1 and by the straight line of mark post 2 with the intersection point of reading panel 1.In the figure 7, mark post 2 is O point with the intersection point of reading panel 1, and straight line OD is datum line, and two of arbitrary neighborhood are waited the difference of the latitude between latitude line to be such as 1 °.Those skilled in the art are readily appreciated that, in application, can arrange the difference of the latitude between the latitude lines such as two of arbitrary neighborhood as required, and two of arbitrary neighborhood are waited the difference of the latitude between latitude line less, the measuring accuracy of described readable type latitude determination instrument is higher.
As shown in Figure 8, datum line gets any point A, and the summit B of point of contact A and mark post 2, obtain right-angle triangle OAB, the length of the length of side OA of right-angle triangle OAB equals the radius R waiting latitude line through an A, and the length of its length of side OB equals the height H of mark post 2, then have
R=H*tan ∠ OBA formula (1).
In the present embodiment, the height H of mark post 2 is such as 300mm, ∠ OBA is step-length value with 0.1 ° between 0-70 °, and namely the number of degrees of ∠ OBA are followed successively by 0.1 °, 0.2 °, 0.3 °, 0.4 °, 0.5 ° ...Then the radius R corresponding with each number of degrees of ∠ OBA is calculated according to above-mentioned formula (1).Last with O point for the center of circle, be that radius draws one group of concentric circles with R, can obtain as shown in Figure 7 wait latitude line.In the present embodiment, the measuring accuracy of described readable type latitude determination instrument is 0.1 °.
Point different situations introduce the latitude determination method that the present embodiment provides below, and this latitude determination method adopts above-mentioned readable type latitude determination instrument.Select the fine day measuring place, close to noon, described readable type latitude determination instrument is positioned on the ground level in measurement place, make mark post aim at the direction of the sun, and make base 3 and reading panel 1 all be positioned at the surface level measuring place by regulating.
(a) situation one:
As shown in Figure 9, when subsolar point Z be positioned at the Southern Hemisphere, measure place P be positioned at the Northern Hemisphere and the shadow of mark post does not exceed the range of readings of reading panel time, the latitude of subsolar point Z is θ 1, and measuring the latitude of place P is θ 2; First the base of above-mentioned readable type latitude determination instrument is placed on the L0 of local horizon, and the bottom of mark post is placed in measurement place P; Then reading panel is rotated the first preset angle along clockwise direction to measure centered by the P of place, mark post PQ1 also correspondingly rotates the first preset angle to measure centered by the P of place along clockwise direction simultaneously with it, namely the top of mark post turns to a Q2 by a Q1, and the first preset angle equals the latitude θ 1 of subsolar point Z, therefore ∠ Q1PQ2=θ 1, the extended line of i.e. ∠ MPQ2=θ 1, mark post PQ1 is through the earth's core O point.
As shown in Figure 5 and Figure 6, reading panel is as follows to measure the method for rotating the first preset angle centered by the P of place along clockwise direction: by being fixed on the two ends of the second cross bar 10 in different buckles 11 and/or regulating the length of the first pole 9, to make the angle between the rope of suspension first weight 6 and mark post 2 be θ 1.
Because ∠ POZ and ∠ PMT2 is the alternate interior angle of same group of parallel lines;
So ∠ POZ=∠ PMT2;
Again because can be obtained ∠ POZ=θ 1+ θ 2 by Fig. 9;
So ∠ PMT2=θ 1+ θ 2 formula (2);
Because ∠ PMT2 is the exterior angle of triangle PMQ2;
So ∠ PMT2=∠ MPQ2+ ∠ MQ2P;
Again because ∠ MPQ2=θ 1;
So ∠ PMT2=θ 1+ ∠ MQ2P formula (3);
∠ MQ2P=θ 2 can be obtained by formula (2) and formula (3);
Again because ∠ MQ2P is the angular readings obtained on reading panel;
So, when subsolar point Z be positioned at the Southern Hemisphere, measure place P be positioned at the Northern Hemisphere and the shadow of mark post does not exceed the range of readings of reading panel time, measure the latitude of place P equal by the reading panel of above-mentioned readable type latitude determination instrument by measure rotate the first preset angle along clockwise direction centered by the P of place after the angular readings that obtains on reading panel, now the first preset angle equals the latitude θ 1 of subsolar point Z.
(b) situation two:
As shown in Figure 10, when subsolar point Z be positioned at the Southern Hemisphere, measure place P be positioned at the Northern Hemisphere and the shadow of mark post exceeds the range of readings of reading panel time, the latitude of subsolar point Z is θ 1, and measuring the latitude of place P is θ 2; First the base of above-mentioned readable type latitude determination instrument is placed on the L0 of local horizon, and the bottom of mark post is placed in measurement place P; Then reading panel is rotated the first preset angle along clockwise direction to measure centered by the P of place, mark post PQ1 also correspondingly rotates the first preset angle to measure centered by the P of place along clockwise direction simultaneously with it, namely the top of mark post turns to a Q2 by a Q1, and the first preset angle equals the latitude θ 1 of subsolar point Z, therefore ∠ Q1PQ2=θ 1, the extended line of i.e. ∠ MPQ2=θ 1, mark post PQ1 is through the earth's core O point; Again reading panel is rotated the second preset angle θ 3 along clockwise direction to measure centered by the P of place, mark post PQ2 also correspondingly rotates the second preset angle θ 3 to measure centered by the P of place along clockwise direction simultaneously with it, namely the top of mark post turns to a Q3 by a Q2, therefore ∠ Q3PQ2=θ 3.It should be noted that, reading panel can be exchanged to measure the order of rotating the first preset angle and the second preset angle centered by the P of place along clockwise direction, namely also first reading panel can be rotated the second preset angle θ 3 along clockwise direction to measure centered by the P of place, then reading panel be rotated the first preset angle along clockwise direction to measure centered by the P of place.
Because ∠ POZ and ∠ PMT3 is the alternate interior angle of same group of parallel lines;
So ∠ POZ=∠ PMT3;
Again because can be obtained ∠ POZ=θ 1+ θ 2 by Figure 10;
So ∠ PMT3=θ 1+ θ 2 formula (4);
Because ∠ PMT3 is the exterior angle of triangle PMQ3;
So ∠ PMT3=∠ MPQ3+ ∠ MQ3P; Formula (5);
∠ MPQ3+ ∠ MQ3P=θ 1+ θ 2 formula (6) can be obtained by formula (4) and formula (5);
∠ MPQ3=∠ MPQ2+ ∠ Q3PQ2 can be obtained by Figure 10;
Again because ∠ MPQ2=θ 1, and ∠ Q3PQ2=θ 3;
So ∠ MPQ3=θ 1+ θ 3; Formula (7);
θ 2=∠ MQ3P+ θ 3 can be obtained by formula (6) and formula (7);
Again because ∠ MQ3P is the angular readings obtained on reading panel;
So, when subsolar point Z be positioned at the Southern Hemisphere, measure place P be positioned at the Northern Hemisphere and the shadow of mark post exceeds the range of readings of reading panel time, measure the latitude of place P equal by the reading panel of above-mentioned readable type latitude determination instrument by measure rotate the first preset angle and the second preset angle along clockwise direction centered by the P of place after the angle sum of the angular readings that obtains on reading panel and the second preset angle, now the first preset angle equals the latitude θ 1 of subsolar point Z.
(c) situation three:
As shown in figure 11, when subsolar point Z and measure place P be all positioned at the Northern Hemisphere, measure place P to be positioned to the north of subsolar point Z and the shadow of mark post does not exceed the range of readings of reading panel time, the latitude of subsolar point Z is θ 1, and the latitude measuring place P is θ 2; First the base of above-mentioned readable type latitude determination instrument is placed on the L0 of local horizon, and the bottom of mark post is placed in measurement place P; Then base is rotated the first preset angle θ 3 in the counterclockwise direction to measure centered by the P of place, mark post PQ1 also correspondingly rotates the first preset angle θ 3 to measure centered by the P of place in the counterclockwise direction simultaneously with it, namely the top of mark post turns to a Q2 by a Q1, therefore the extended line of ∠ Q1PQ2=θ 3, mark post PQ1 is through the earth's core O point; Again reading panel is rotated the second preset angle θ 4 along clockwise direction to measure centered by the P of place, mark post PQ2 also correspondingly rotates the second preset angle θ 4 to measure centered by the P of place along clockwise direction simultaneously with it, namely the top of mark post turns to a Q3 by a Q2, therefore ∠ Q2PQ3=θ 4, first preset angle θ 3 is greater than the second preset angle θ 4, and the latitude that the difference of the angle of the first preset angle θ 3 and the second preset angle θ 4 equals subsolar point Z is θ 1, i.e. θ 3-θ 4=θ 1, therefore ∠ Q3PQ1=θ 1, i.e. ∠ MPQ1=θ 1.It should be noted that, base to be rotated the first preset angle θ 3 in the counterclockwise direction to measure and can be exchanged to measure the order of rotating the second preset angle θ 4 centered by the P of place along clockwise direction by reading panel centered by the P of place, namely also first reading panel can be rotated the second preset angle θ 4 along clockwise direction to measure centered by the P of place, then base be rotated the first preset angle θ 3 in the counterclockwise direction to measure centered by the P of place.
Because ∠ POZ and ∠ PQ1M is the alternate interior angle of same group of parallel lines;
So ∠ POZ=∠ PQ1M;
Again because can be obtained ∠ POZ=θ 2-θ 1 by Figure 11
So ∠ PQ1M=θ 2-θ 1 formula (8);
Because ∠ PMT1 is the exterior angle of triangle PMQ1;
So ∠ PMT1=∠ MPQ1+ ∠ PQ1M formula (9);
∠ PMT1=∠ MPQ1+ θ 2-θ 1 can be obtained by formula (8) and formula (9);
Again because ∠ MPQ1=θ 1;
So ∠ PMT1=θ 2 formula (10);
Because ∠ PMT1 and ∠ PQ3T3 is the corresponding angle of same group of parallel lines;
So ∠ PMT1=∠ PQ3T3 formula (11);
θ 2=∠ PQ3T3 can be obtained by formula (10) and formula (11);
Again because ∠ PQ3T3 is the angular readings obtained on reading panel;
So, when subsolar point Z and measurement place P is all positioned at the Northern Hemisphere, measure place P to be positioned to the north of subsolar point Z and the shadow of mark post does not exceed the range of readings of reading panel time, the latitude measuring place P equals first the base of above-mentioned readable type latitude determination instrument to be rotated the first preset angle in the counterclockwise direction to measure centered by the P of place, the angular readings obtained on reading panel after again the reading panel of above-mentioned readable type latitude determination instrument being rotated the second preset angle along clockwise direction, now the first preset angle is greater than the second preset angle and the difference of the angle of the first preset angle and the second preset angle equals the latitude θ 1 of subsolar point Z.
(d) situation four:
In like manner can obtain, when subsolar point Z and measurement place P is all positioned at the Northern Hemisphere, measure place P to be positioned to the north of subsolar point Z and the shadow of mark post exceeds the range of readings of reading panel time, measure the latitude of place P equal first by the base of above-mentioned readable type latitude determination instrument to measure the angle sum of rotating angular readings and the second preset angle obtained on reading panel after the reading panel of above-mentioned readable type latitude determination instrument is rotated the second preset angle by the first preset angle more along clockwise direction centered by the P of place in the counterclockwise direction, now the second preset angle is greater than the first preset angle and the first preset angle equals the latitude θ 1 of subsolar point Z.
(e) situation five:
In like manner can obtain, when subsolar point Z and measurement place P is all positioned at the Northern Hemisphere, and measure place P when being positioned on the south subsolar point Z, measure the latitude of place P equal first by the base of above-mentioned readable type latitude determination instrument to measure the angular readings of rotating in the counterclockwise direction centered by the P of place and obtaining on reading panel after the reading panel of above-mentioned readable type latitude determination instrument is rotated the second preset angle by the first preset angle more along clockwise direction, now the first preset angle is greater than the second preset angle and the difference of the angle of the first preset angle and the second preset angle equals the latitude θ 1 of subsolar point Z.
Compared with the mark post shadows cast by the sun method of prior art, the described readable type latitude determination instrument of the present embodiment and latitude determination method can measure the latitude in earth surface place to be measured, can improve the measuring accuracy of earth surface latitude.
Should be appreciated that above is illustrative and not restrictive by preferred embodiment to the detailed description that the technical solution of the utility model is carried out.Those of ordinary skill in the art can modify to the technical scheme described in each embodiment on the basis of reading the utility model instructions, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (9)
1. a readable type latitude determination instrument, it is characterized in that, this readable type latitude determination instrument comprises reading panel (1), mark post (2), base (3), protractor (4), the first cross bar (5) and the first weight (6);
One end of the bottom surface of reading panel (1) and one end chain connection of base (3), make reading panel (1) can rotate centered by reading panel (1) with the junction of base (3);
The bottom of mark post (2) is fixedly installed on the upper surface of reading panel (1), mark post (2) is positioned at one end be connected with base (3) of reading panel (1), and mark post (2) is perpendicular to the upper surface of reading panel (1);
First cross bar (5) is arranged at the top of mark post (2), and the first cross bar (5) is mutually vertical with mark post (2);
Protractor (4) is fixedly installed on the centre position of mark post (2), and mark post (2) is positioned at the center of protractor (4);
First weight (6) hangs on the center of protractor (4) by rope, and the first weight (6) can be freely sagging under gravity;
Base (3) is provided with the first pole (9) for supporting reading panel (1), and the first pole (9) is in inverted V-shaped; The top of the first pole (9) and the bottom surface chain connection of reading panel (1), the openend of the first pole (9) is towards the second cross bar (10), and the first pole (9) and the second cross bar (10) form a triangle;
Base (3) is provided with organizes buckle (11) more; The two ends of the second cross bar (10) are fixed in any one group of buckle (11);
The bottom of base (3) is provided with the second pole (12) for base for supporting (3), second pole (12) is connected with the bottom hinge of base (3), and the second pole (12) and mark post (2) are positioned at same one end of base (3);
The upper surface of reading panel (1) such as to be provided with at latitude line and the datum line.
2. readable type latitude determination instrument according to claim 1, it is characterized in that, described readable type latitude determination instrument also comprises the second weight (7) and the 3rd weight (8) that are hung on the first cross bar (5) two ends by rope respectively, and the second weight (7) and the 3rd weight (8) can be freely sagging under gravity.
3. readable type latitude determination instrument according to claim 1 and 2, is characterized in that, described reading panel (1) is rectangle.
4. readable type latitude determination instrument according to claim 1 and 2, is characterized in that, described base (3) is rectangle.
5. readable type latitude determination instrument according to claim 1 and 2, is characterized in that, the adjustable length of described second pole (12).
6. readable type latitude determination instrument according to claim 1 and 2, is characterized in that, the adjustable length of described first pole (9).
7. readable type latitude determination instrument according to claim 1 and 2, is characterized in that, the bottom of described base (3) is provided with three for regulating the leg of level.
8. readable type latitude determination instrument according to claim 1 and 2, is characterized in that, described latitude line of Denging is take the intersection point of described mark post (2) and described reading panel (1) as one group of concentric circles in the center of circle.
9. readable type latitude determination instrument according to claim 1 and 2, it is characterized in that, described datum line is long side direction along described reading panel (1) and by the straight line of described mark post (2) with the intersection point of described reading panel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346443.6U CN204788346U (en) | 2015-05-26 | 2015-05-26 | Readable type latitude determination appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346443.6U CN204788346U (en) | 2015-05-26 | 2015-05-26 | Readable type latitude determination appearance |
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| Publication Number | Publication Date |
|---|---|
| CN204788346U true CN204788346U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520346443.6U Withdrawn - After Issue CN204788346U (en) | 2015-05-26 | 2015-05-26 | Readable type latitude determination appearance |
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| CN (1) | CN204788346U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833337A (en) * | 2015-05-26 | 2015-08-12 | 郜浩然 | Readable instrument and method for measuring latitudes |
-
2015
- 2015-05-26 CN CN201520346443.6U patent/CN204788346U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833337A (en) * | 2015-05-26 | 2015-08-12 | 郜浩然 | Readable instrument and method for measuring latitudes |
| CN104833337B (en) * | 2015-05-26 | 2017-08-01 | 郜浩然 | A kind of readable type latitude determination instrument and latitude determination method |
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